二、贸易学习者李华给专家professor smith 寄去的一篇论文，并得到热心及时指导，写的一封感谢信。 Dear Professor， I’m Lihua, who is majoring trade. As it's known to all, trade study is interesting. Learning trade makes me know more about the world as well. Through a lot of study, I write an essay about trade. In my opinion, trade study is interesting, but I have some difficulties in learning it. Could you please give me a hand and give me some advice about my essay ? Thanks a lot! Wish you good luck! Yours, Li Hua 本文来源：https://www.wddqw.com/doc/1e7f33bc011ca300a7c39024.html